Gapped gear.



W. T. SEARS.

GAPPBD GEAR.

APPLICATION FILED Am. 22, 1910.

972,261; PatentedOct. 11,1910.

YAW/II/z witnesses Inventor MW 2 wittard T Sears (tiiornay THE NORRIS PETERS Cm, wasnmc'ruu, n c.

UNITED STATES PATENT OFFICE. WIITLARD T. SEARS, OF PHILADELTQTATPENNSYLVANIA, ASSIGNOR TO NILES-BEMENT- POND COMPANY, OF JERSEY CITY, NEW JERSEY.

GAPPED GEAR.

Specification of Letters Patent.

Patented Oct. 11, 1910.

To all whom it may concern:

Be it known that I, \VILLARD T. SEARS, a citizen of the United States, residing at Philadelphia, Philadelphia county, Pennsylvania, have invented certain new and useful Improvements in Gapped Gears, of which the following is a specification.

This invention pertains to gears gapped through the rim and inwardly, such gears being frequently employed in car axle lathes designed for the turning of car-wheels while on their axle, the driving apparatus, including the gapped gear, being disposed around the axle between the wheels, and the inven tion relates to the system for operating the rim-patch in opening and closing the gap.

The invention will be readily understood from the following description taken in connection with the accompanying drawing, which is a side elevation of a gapped gear exemplifying the invention.

In the drawing: 1, indicates the rim of the gear: 2, the hub: 3, the gap, extending through the rim and inwardly: =1, the patch adapted, when in place, to bridge the gap in the rim: 5, tail-bars extending from one end of the patch: 6, a pivot connecting the tailbars with the gear and serving to hinge the patch to the gear: 7, a latch-shoulder 011 the gear at that side of the gap opposite the side to which the patch is hinged: 8, a lever pivoted to the patch and extending inwardly: 9, a latch-hook on the lever, adapted to cooperate with shoulder 7 when the patch is in closed position: 11, a spring serving to throw and hold the lever to latched position when the patch is in closed position: 12, a cylinder carried by the inner portion of the gear, its axis being substantially in line with lever 8 when the patch is in open position: 13, an inlet to the cylinder whereby, through any suitable means, compressed air may be admitted to and exhausted from the cylinder: 14, a piston working in the cylinder: and 15, a rod connecting the piston with the inner end of the lever.

The drawing illustrates the patch in open position, a position in which it is held by air pressure which is at this time assumed to be acting in the cylinder. Then the patch is to go to closed position the air is to be al lowed to exhaust from the cylinder, whereupon the patch drops to closed position and the latch-hook engages the latch-shoulder, locking the patch in place. When the gap is to be opened then the air is to be admitted to the cylinder, the first effect of the movement of the piston being to flex the lever upon its pivot and release the latch, the further elfect being to push the patch to completely open position as shown in the drawing. It will be apprehended that, in functional movement of the parts, the piston-rod flexes to some extent. Forming the piston of somewhat spherical contour permits of the piston rocking in the cylinder and avoids the necessity for pivoting the rod to the piston, thus simplifying thestructure.

I claim l. A gapped gear comprising, a gear provided with a gap extending through its rim and inwardly, a patch hinged to the gear at one side of the gap and adapted to bridge the gap in the rim, a cylinder carried by the gear and adapted to be supplied with fluid under pressure, a piston in' the cylinder, and a connection from the piston to the patch, combined substantially as set forth.

2. A gapped gear comprising, a gear provided with a gap extending through its rim and inwardly, a patch hinged to the gear atone side of the gap and adapted to bridge the gap-in the rim, a cylinder carried by the gear and adapted to be supplied with fluid under pressure, apiston in the cylinder, a connection from the piston to the patch, and a latch controlled by the piston and adapted to lock the patch in closed position, combined substantially as set forth.

3. A gapped gear comprising, a gear provided with a gap extending through its rim and inwardly, a patch hinged to the gear at one side of the gap and adapted to bridge the gap in the rim, a cylinder carried by the gear and adapted to be supplied with fluid under pressure, a piston in the cylinder, a lever pivoted to the patch and extending toward the cylinder, a connection When the patch is in closed position, c0111- lloletween thel I gistcfln land thedleger, 2:1 latchbined substantially as set forth.

ook carrie I yt e ever an a a te to cooperate with the latch-shoulder arried by WILLARD S the gear at the side. of the gap opposite to Witnesses: that at Which the patch is hinged, and a R. RAYMOND PORTER, spring to urge the'latch to latching position CHARLES W. ARRIsoN. 

